The volcanic‐hosted Xiangshan uranium orefield is the largest uranium deposit in South China. Recent exploration has discovered extensive Pb–Zn mineralization beneath the uranium orebodies. Detailed geological investigation reveals that the major metallic minerals include pyrite, sphalerite, galena, and chalcopyrite, whilst the major non‐metallic minerals include quartz, sericite, and calcite. New δ¹⁸O_fluid and δD_fluid data indicate that the ore‐forming fluids were mainly derived from magmatic, and the sulfide δ³⁴S values (2.2–6.9‰) suggest a dominantly magmatic sulfur source. The Pb isotope compositions are homogeneous (²⁰⁶Pb/²⁰⁴Pb = 18.120–18.233, ²⁰⁷Pb/²⁰⁴Pb = 15.575–15.698, and ²⁰⁸Pb/²⁰⁴Pb = 37.047–38.446). The ⁸⁷Sr/⁸⁶Sr ratios of sulfide minerals range from 0.7197 to 0.7204, which is much higher than volcanic rocks and fall into the range of metamorphic basement. Lead and strontium isotopic compositions indicate that the metallogenic materials probably were derived from metamorphic basement. Pyrite Rb–Sr dating of the ores yielded 131.3 ± 4.0 Ma, indicating that the Pb–Zn mineralization occurred in the Early Cretaceous.

中文翻译：

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华南象山铀矿田下铅锌矿化成因：H–O–S–Pb同位素和Rb–Sr定年的约束

座落在火山上的象山铀矿田是华南地区最大的铀矿床。最近的勘探发现铀矿体下有大量的Pb-Zn矿化。详细的地质调查表明，主要的金属矿物包括黄铁矿，闪锌矿，方铅矿和黄铜矿，而主要的非金属矿物包括石英，绢云母和方解石。新δ ^18个ö_流体和δD_流体的数据表明，矿石形成流体主要从岩浆衍生的硫化物δ ^34个价值观（2.2-6.9‰）建议一种显性岩浆硫源。铅同位素组合物是均质的（²⁰⁶ PB / ²⁰⁴ PB = 18.120-18.233，²⁰⁷的Pb /²⁰⁴ Pb = 15.575–15.698，和²⁰⁸ Pb / ²⁰⁴ Pb = 37.047–38.446）。硫化物矿物的⁸⁷ Sr / ⁸⁶ Sr比值范围为0.7197至0.7204，远高于火山岩，属于变质基底范围。铅和锶同位素组成表明成矿物质可能来自变质基底。矿石的黄铁矿Rb–Sr定年产生了131.3±4.0 Ma，表明Pb–Zn矿化发生在白垩纪早期。